The following list is hard to classify. Think of it as a pinch of this and a dash of that. Although all of the items listed are not necessary for your basic home bar, they would be nice to have for that special drink.

Bitters (Angostura)
Worcestershire
Tabasco
Beef Bullion 
Salt
Pepper
Sugar Cubes
Superfine Sugar
Powdered Sugar
Orange Flower water
Milk
Heavy Cream
Coffee
Celery Salt
Horseradish